Why does it bother you what weapon kills you?
At the end of the day, you are still dead, the enemy alive, you worse, he better, and that's how it is. The rest is whining, plain and simple.

I don't look at being CG'd any different from being killed by the 3-burst pistol: I still screwed up and I need to improve.

I just don't get the mentality of "oh no, it's definitely NOT my fault because I was killed by [I]that[/I] particular weapon."

Come on. That makes no sense at all.